"It is no secret that 4A Games do want to release an SDK for Metro, finish the extremely promising multiplayer component and release this in some form, and investigate a PlayStation 4 version provided it makes commercial sense," a Deep Silver rep told Joystiq.

"Although no development has started on any next-gen console versions [of Metro: Last Light], we have confirmed these hopes and ideas plenty of times before.

"However, all these ideas are just ideas at the moment. It will be some time before we can officially commit to any of these projects or suggest when they might materialise. They genuinely might all happen, but equally none of them might happen.

"Anyone expecting Metro: Last Light as a PS4 launch game is probably going to be disappointed."